/Engine/Source/Editor/BlueprintGraph/Public/BlueprintNodeSpawner.h
typedef TBaseDelegate_ThreeParams< void, [FBlueprintActionContext](API\Editor\BlueprintGraph\FBlueprintActionContext) const &, [FBindingSet](API\Editor\BlueprintGraph\IBlueprintNodeBinder\FBindingSet) const &, [FBlueprintActionUiSpec](API\Editor\BlueprintGraph\FBlueprintActionUiSpec) * > FUiSpecOverrideDelegate